Investigation of the Precipitation in Mg-Zr Alloys

Abstract:

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The Mg-Zr alloys with the Zr contents of 0.2%, 0.4%, 0.6% and 0.8% were prepared
using induction melting, metal mold centrifugal casting process. The microstructures of the alloys
were analyzed by scanning electron microscope, energy spectrum analysis, transmission electron
microscope and their mechanical properties were also measured with tensile test. The results show
that there are many micro- and nano-sized Zr-rich or Zr particles dispersed in Mg-Zr alloys. The
nano-sized Zr-rich particle consists of a rectangle shaped Zr core and its surrounding Mg (Zr) solid
solution shell with round exterior; a single Zr particle appears a coherent lattice relationship with
matrix.